Mirages (color insert, Figures 27a, b, c) are examples of atmospheric phenomena in which air refracts light enough essentially to produce reflections. Other refraction phenomena include the flattened sun (color insert, Figure 27d), the green flash (color insert, Figure 27e), the paper-lantern sun (color insert, Figure 27f), and twinkling of distant lights. [Source: Encyclopedia of Perception; Mirages]
mirages
concepts
visual perception